US 12,403,038 B2
Systems and methods for creating a lenticule for presbyopia
Zsolt Bor, San Clemente, CA (US); Mario Klafke, Mainaschaff (DE); Johannes Krause, Nuremberg (DE); and Keith Watanabe, Irvine, CA (US)
Assigned to ALCON INC., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Dec. 9, 2021, as Appl. No. 17/643,440.
Claims priority of provisional application 63/126,343, filed on Dec. 16, 2020.
Prior Publication US 2022/0183885 A1, Jun. 16, 2022
Int. Cl. A61F 9/008 (2006.01)
CPC A61F 9/00827 (2013.01) [A61F 2009/00872 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ophthalmic surgical system for creating a lenticule in a cornea of an eye, comprising:
a plurality of controllable components comprising:
a laser source configured to generate a laser beam having a plurality of ultrashort pulses, a propagation direction of the laser beam defining a z-axis; and
a scanner configured to direct a focal point of the laser beam in an xy-plane orthogonal to the z-axis and in a z-direction parallel to the z-axis;
a computer configured to:
determine a lenticule design for the lenticule having a posterior side and an anterior side, either the posterior side or the anterior side having a central portion and a peripheral portion, the lenticule design formed using a major lenslet and a minor lenslet, the major lenslet designed to correct to emmetropia, the lenticule design formed by subtracting the minor lenslet from the major lenslet, the subtraction of the minor lenslet yielding the central portion; and
instruct one or more of the controllable components to perform the following to create the lenticule:
create the posterior side of the lenticule according to the lenticule design; and
create the anterior side of the lenticule according to the lenticule design.
 
12. The ophthalmic surgical system of claim 1, the computer further configured to:
generate a laser focal spot pattern corresponding to the lenticule design, a point of the laser focal spot pattern representing a center of the central portion;
determine an xy position of a visual axis of the eye; and
align the point of the laser focal spot pattern relative to the xy position of the visual axis to create the lenticule.